The following products are currently available from Ancestor Tracks:

 

State of PA   First Landowners of Pennsylvania: Colonial and State Warrant Registers in the PA Archives, Harrisburg 1682-ca 1940 (CD with .pdf files)   

Berks Co.:  

Scans of Township Warrantee Maps of Berks Co. in the PA Archives (maps only)

   
Fayette Co.:  

Early Landowners of Pennsylvania: Atlas of Township Warrantee Maps of Fayette County, PA (372 pages)

   
Scans of Township Warantee Maps of Fayette County, PA (companion to book above)    
Best Buy:Fayette Co. Combination: Atlas (PB08) plus CD of scans (PS08)

   
Greene Co.:  

Early Landowners of Pennsylvania: Atlas of Township Warrantee Maps of Greene County, PA (372 pages)    
Scans of Township Warantee Maps of Greene County, PA (companion to book above)    
Best Buy:Greene Co. Combination: Atlas (PB09) plus CD of scans (PS09)

   
Lancaster Co.:  

Early Landowners of Pennsylvania: Atlas of Township Warrantee Maps of Lancaster County, PA (609 pages)   
Scans of Township Warantee Maps of Washington County, PA (companion to book above)    
Best Buy:Lancaster Co. Combination: Atlas (PB12) plus CD of scans (PS12)    
Washington Co.:  

Early Landowners of Pennsylvania: Atlas of Township Warrantee Maps of Washington County, PA (383 pages)   
Scans of Township Warantee Maps of Washington County, PA (companion to book above)    
Best Buy:Washington Co. Combination: Atlas (PB27) plus CD of scans (PS27)    
Caldwell's Illustrated Historical Atlas of Washington County, PA(.pdf format on CD)

   
PA/VA/WV 1779-1780:  

Early Landowners of Pennsylvania: Land Tracts Transferred from Virginia to Pennsylvania Jurisdiction 1779-1780 (217 pages + index)